1：确定你的内核支持U番

　　<1>：SCSI的选项默认就可以
　　<2>：USB的选项一定要安装<*> USB Mass Storage support
　　<3>：如下：
　　代码:
　　 <*> SCSI support
　　 --- SCSI support type (disk, tape, CD-ROM)
　　 <*> SCSI disk support
　　 (40) Maximum number of SCSI disks that can be loaded as modules
　　 < > SCSI tape support
　　 < > SCSI OnStream SC-x0 tape support
　　 < > SCSI CD-ROM support
　　 < > SCSI generic support
　　 --- Some SCSI devices (e.g. CD jukebox) support multiple LUNs
　　 [*] Enable extra checks in new queueing code
　　 [*] Probe all LUNs on each SCSI device
　　 [*] Verbose SCSI error reporting (kernel size +=12K)
　　 [ ] SCSI logging facility
　　 SCSI low-lEVEl drivers --->
　　 PCMCIA SCSI adapter support --->
　　<*> USB Mass Storage support
　　 [ ] USB Mass Storage verbose debug
　　 [ ] Freecom USB/ATAPI Bridge support
　　 [ ] ISD-200 USB/ATA Bridge support
　　 [ ] Microtech CompactFlash/SmartMedia support

　　2：fdisk -l